如何在 Eclipse 中调试 Apache Storm？

Question

我们可以使用特定的参数生成storm jar。但是，如果我们需要在本地和远程调试这个项目（实际上很远）？

如果是简单的jar，我们可以调试。但是，在这里我们使用以下命令部署 jar： storm jar project.jar main_class_name

不知道如何部署storm拓扑，以便在调试模式下进行storm项目？

请在下面找到更新的 yaml 文件：

 

    # Licensed to the Apache Software Foundation (ASF) under one
    # or more contributor license agreements.  See the NOTICE file
    # distributed with this work for additional information
    # regarding copyright ownership.  The ASF licenses this file
    # to you under the Apache License, Version 2.0 (the
    # "License"); you may not use this file except in compliance
    # with the License.  You may obtain a copy of the License at
    #
    # http://www.apache.org/licenses/LICENSE-2.0
    #
    # Unless required by applicable law or agreed to in writing, software
    # distributed under the License is distributed on an "AS IS" BASIS,
    # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    # See the License for the specific language governing permissions and
    # limitations under the License.

    ########### These MUST be filled in for a storm configuration
    # storm.zookeeper.servers:
    #     - "server1"
    #     - "server2"
    # 
    # nimbus.host: "nimbus"
    # 
    # 
    # ##### These may optionally be filled in:
    #    
    ## List of custom serializations
    # topology.kryo.register:
    #     - org.mycompany.MyType
    #     - org.mycompany.MyType2: org.mycompany.MyType2Serializer
    #
    ## List of custom kryo decorators
    # topology.kryo.decorators:
    #     - org.mycompany.MyDecorator
    #
    ## Locations of the drpc servers
    # drpc.servers:
    #     - "server1"
    #     - "server2"

    ## Metrics Consumers
    # topology.metrics.consumer.register:
    #   - class: "backtype.storm.metric.LoggingMetricsConsumer"
    #     parallelism.hint: 1
    #   - class: "org.mycompany.MyMetricsConsumer"
    #     parallelism.hint: 1
    #     argument:
    #       - endpoint: "metrics-collector.mycompany.org"

    worker.childopts:"-agentlib:jdwp=transport=dt_socket,server=y,address=8999,suspend=n"

Answer 1

如果要远程调试，需要在工作 JVM 中启用调试。有关正确的 Java 标志，请参见此处：Remote debugging a Java application

在 all/shared supervisor storm.yaml 中将此标志添加到条目 worker.childopts （可能需要重新启动 Storm 集群）。 您需要确保每个主机只启动一个工作线程！ 否则，两个 JVM 想要打开同一个端口，其中一个当然会失败。

在 Eclipse 中，选择Run -> Debug Configuration 并创建一个新的Remote Java Application。指定要调试的正在运行的worker JVM的主机和端口（端口必须与worker.childopts中指定的相同）。

Answer 2

要启用跨各种主管虚拟机的调试，您只需编辑storm.yaml 文件并将worker.childopts 条目更新为：

worker.childopts: "-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5%ID%"

如果您的主管在 6700、6701、6702 等端口上，这将在 56700、56701、56702 等端口上创建一个调试端口。